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Solid-state microwave ovens

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New for October 2018: We spend a lot of time explaining to non-engineers that Microwaves101 is NOT about microwave ovens, but on this topic we make an exception. There's been a lot of buzz lately about advances in cooking technology, specifically the use of solid-state power amplifiers that can cook food with much greater control than the ubiquitous magnetron-based microwave ovens. This is a real breakthrough in technology that will change the way microwaves are used to cook food.  The "old fashioned" microwave operated at a single frequency which makes for unavoidable hot spots. Solid-state microwaves will have a frequency sythesizer that can hop around in frequency, and exploit modulation to direct the energy where it will do the most good. Solid-state microwaves were enabled by wide bandgap semiconductors that were originally developed for military applicaations, such as gallium nitride.  The only reason you don't own a solid-state microwave in 2018 is that the cost is still significantly higher than magnetrron-based products, where the high-power signal is provided by a vacuum tube that costs about fifteen dollars.

NXP has led the development of this new product.  Here's a clip courtesy of Microwaves & RF of a solid-state oven that they demoed at IMS back in 2014:

Author : Unknown Editor

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